1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/for-of/iterclose-extra-args.js b/js/src/jit-test/tests/for-of/iterclose-extra-args.js
new file mode 100644
index 0000000000..e0564d14d6
--- /dev/null
+++ b/js/src/jit-test/tests/for-of/iterclose-extra-args.js
@@ -0,0 +1,41 @@
+const iterable = {
+  [Symbol.iterator]() {
+    return {
+      i: 0,
+      next() {
+        return { value: this.i++, done: false }
+      },
+      return(a, b, c, d) {
+        assertEq(a, undefined);
+        assertEq(b, undefined);
+        assertEq(c, undefined);
+        assertEq(d, undefined);
+        return { value: "return", done: true };
+      }
+    };
+  }
+}
+
+function closeIter(o) {
+  for (var x of o) {
+    if (x == 2) {
+      break;
+    }
+  }
+}
+
+function test() {
+  with ({}) {}
+  for (var i = 0; i < 100; i++) {
+    closeIter(iterable)
+  }
+}
+
+with ({}) {}
+
+test();
+
+// Force an IC in Ion.
+closeIter([1,2,3,4,5]);
+
+test();